Analysis of the degradation in the Wells turbine blades of the Pico oscillating-water-column wave energy plant

Bruschi, Daniele; Fernandes, João; Falcão, A.F.O.; Bergmann, C.P.

doi:10.1016/j.rser.2019.109368

Cited by 17 publications

(6 citation statements)

References 9 publications

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“…One of the first commercial examples of this technology was constructed in Toftestallen, Norway in 1985 [489]. Other notable early examples were the LIMPET power plant installed on the Isle of Islay of the west coast of Scotland in 2000 [75,834,254,11], the Pico power plant [218,222,93,90] in the Azores, which went into operation in 1999 and the OSPREY WEC, which was deployed off the coast of Scotland in 1995 [534]. The Mutriku power plant in Spain, which commenced operation in 2011, is one of the most famous examples of a land fixed OWC [779,236,235,363].…”

Section: Fixed Owcsmentioning

confidence: 99%

Modelling and Optimisation of Wave Energy Converters

Ning¹,

Ding²

2022

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Section: Fixed Owcsmentioning

confidence: 99%

Modelling and Optimisation of Wave Energy Converters

Ning¹,

Ding²

2022

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“…The sub-profiles are preselected based on the rotor application, for example, based on the working fluid, i.e., air or water, and the working parameters, i.e., Reynolds number. The sub-profiles are customarily catalogued based on the nomenclature adopted by research centres from all over the world [10], an example of which are the aerofoils that have been accepted by the National Advisory Committee for Aeronautics (NACA), which are described with several digits that distinctly specify the sub-profile geometry. The description of the characteristic elements of the sub-profile is shown in Figure 1.…”

Section: Bladementioning

confidence: 99%

Experimental and Numerical Studies on the Influence of Blade Number in a Small Water Turbine

2021

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This paper demonstrates the procedure of blade adjustment in a Kaplan-type water turbine, based on calculations of the flow system. The geometrical adjustment of a twisted blade with varying chord length is described in the study. Computational fluid dynamics (CFD) analysis was used to characterise aerofoil and turbine performance. Furthermore, two turbines, with a different number of blades, were designed, manufactured, and tested experimentally. The numerical model results were then compared with the experimental data. The studies were carried out with different rotational velocities and different stator blade incidence angles. The paper shows a comparison of the turbine efficiencies that were assessed, using numerical and experimental methods, of a flow system with four- and five-bladed rotors. The numerical model results matched up well with those of the experimental study. The efficiency of the proposed turbines reached up to 72% and 84% for four-bladed and five-bladed designs, respectively. These efficiencies, when considered with the turbine’s simplicity, low production and maintenance costs, as well as their potential for harvesting energy from low energy flows, mean that Kaplan turbines provide a promising technology for processing renewable energy.

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“…Instead of using valves to rectify the flow, fluidic diodes have also been considered [7]. Relief valves can also be employed in the OWC system in combination with a wells turbine, for example in the Pico Power Plant in Portugal [8]. However, configurations using valves are not recommended [4], as they contribute to reducing the useful life of the system at the same time that maintenance costs are increased.…”

Section: Introductionmentioning

confidence: 99%

CFD Analysis of the Performance of a Double Decker Turbine for Wave Energy Conversion

et al. 2021

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The Double Decker Turbine (DDT) is a recent design introduced for oscillating water column (OWC) devices. Its major contribution is the combination of two typical solutions in just one prototype: a self-rectifying performance, to deal with the bidirectional flow, and the twin-turbine concept, allowing the use of unidirectional turbines. This is achieved by a set of two concentric turbines, called external and internal turbines (ExT—InT). In this work, Computational Fluid Dynamics (CFD) numerical model is developed to study in detail the performance of a DDT, where geometrical components for both turbines have been taken from previous works of the authors. The ANSYS-Fluent code was first executed by means of a URANS simulation with a realizable k-ε turbulence model to obtain the performance curve of the turbine under steady conditions. Results obtained reveal its potential with respect to other solutions in the current state-of-the-art of OWC solutions for Wave Energy Conversion. Following a non-steady analysis, we assumed a sinusoidal input from the chamber which also resulted in promising results. Finally, the flow analysis inside the DDT allowed the authors to envisage geometric improvements that could enhance the DDT efficiency on future works.

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Analysis of the degradation in the Wells turbine blades of the Pico oscillating-water-column wave energy plant

Cited by 17 publications

References 9 publications

Modelling and Optimisation of Wave Energy Converters

Modelling and Optimisation of Wave Energy Converters

Experimental and Numerical Studies on the Influence of Blade Number in a Small Water Turbine

CFD Analysis of the Performance of a Double Decker Turbine for Wave Energy Conversion

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